机电普(石勇)本科毕业设计论文精要.docVIP

重庆科技学院 毕业设计（论文） 题 目 学 院 机械与动力工程学院 专业班级 09-01 学生姓名 学号 2009441165 指导教师 职称 评阅教师 职称 2013年月日ABSTRACT With the development of the society，the production level is the Constantly improving. Manipulator in general machinery, automobile industry, metal structure in the shipbuilding industry, aerospace industry and has been applied. This design topic for the oil cylinder bottom automatic welding design, three degrees of freedom manipulator is hanging a welding torch for homework. In terms of the mechanical structure, each one direction is by stepping motor drives the ball screw rotation, another ball screw driven platform movement, so as to realize the movement of welding torch on line. Control, PLC control system is simple and accurate and effective, this design USES the PLC control to realize automatic welding technology, including automatic arc starting and arc extinguishing, detection after striking success, arcing failure automatic arc starting afresh, uniform wire, block turntable speed control, etc. Stepper motor is an electrical pulse signal into the corresponding linear displacement or angular displacement of the mechanical and electrical actuators, pulse input one by one, the rotor is step by step. Key words: Welding manipulator；PLC；Stepper motor 目录 摘要 …………………………………………………………………………………Ⅰ ABSTRACT…………………………………………………………………………Ⅱ 1 绪 论 ………………………………………………………………………………1 1.1 国外发展的基本状况…………………………………………………………2 1.2 国内发展状况…………………………………………………………………2 1.3 焊接机械手的意义……………………………………………………………3 1.4 CO2气体保护焊介绍 …………………………………………………………3 2 设计方案 …………………………………………………………………………10 2.1 总体方案 ……………………………………………………………………10 2.2 机械结构 ……………………………………………………………………10 2.3 电气控制 ……………………………………………………………………10 2.4 焊机的起弧和灭弧 …………………………………………………………11 3 计算说明 …………………………………………………………………